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26. T4 噬菌體是一種雙股 DNA 病毒,其中一個可被宿主轉錄/轉譯的基因製造出一種酵 素,可以破壞宿主細胞本身的 DNA,但病毒的 DNA 卻無恙。這是因為病毒 DNA 上的哪一種鹼基已被修飾過? (A) 腺嘌呤 (adenine; A) (B) 尿嘧啶 (uracil; U) (C) 鳥糞嘌呤 (guanine; G) (D) 胞嘧啶 (cytosine; C) (E) 胸腺嘧啶 (thymine; T)

1. 一位工人不小心打翻了 溶液,污染他的皮膚 10 cm2,污染活度為 3700 Bq,則污染 皮膚的劑量率為多少 Gy/h? (  貝他粒子的平均能量 = 0.7 MeV,在組織之質量吸收係數為 9.18 cm2/g) (A) 6.42×(B) 1.28×(C) 6.42× (D) 1.28×

76.下列何者最符合赤道原則? (A)赤道原則是國際金融機構的自願性行為規範 (B)赤道原則是一項國際法規 (C)赤道原則是一種投資策略 (D)赤道原則是一項聯合國倡議,旨在減少發展中國家基礎設施對環境的不利影響

38. An enzyme exhibits normal Michaelis-Menten kinetics at pH 7 but displays sigmoidal kinetics at pH 9. Which explanation is most plausible? (A) Enzyme concentration doubled (B) Competitive inhibitor formed (C) Product inhibition dominates (D) Substrate precipitation occurred (E) Subunit ionization alters allosteric cooperativity NTHU115

39. A researcher subjects four distinct biological structures (a functional globular protein, a segment of DNA, a cellulose fiber, anda molecule of amylopectin) to an environment where all non-covalent interactions (hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic interactions) are completely disrupted, but all covalent bonds (peptide bonds, glycosidic linkages, and phosphodiester linkages) remain intact. Which resulting observation is the LEAST accurate regarding the stable molecular components remaining after this treatment? (A) The globular protein, such as transthyretin, would be converted into a nonfunctional, linear polypeptide chain, retaining its unique amino acid sequence. (B) The secondary structure elements (such as a-helices and β-pleated sheets) within the polypeptide backbone of the globular protein would no longer exist. (C) The two complementary strands of the DNA double helix would separate entirely, resulting in two distinct, single polynucleotide strands. (D) The amylopectin molecule (a storage polysaccharide) would be cleaved into hundreds of individual glucose monomers. (E) A cellulose molecule would retain its straight, unbranched configuration, although it would no longer be grouped into strong microfibrils.